David Hancock born 13 Mar 1797 in NC who died 1871 married Keziah Watkins. His father was Vachel Hancock born 1760 in Indiana. His grandfather was John Hancock born 12 Jun 1743.
If this is not the David Hancock you were thinking about, please indicate where he was born. Others by the same name born about the same time were born in Delaware, Derby England, and other locations.